I have one - just one - mad eyebrow hair that grows up to 30+ mm WTF is that all about?

Jesus TJ, I have one of those. Over my left eye. Mrs deadly's always trying to get at it. Complete ninja eyebrow...grows straight out of my forehead instead of in line with the rest and about twice as long as it's conformist comrades. I call it my "guardianista" eyebrow.